3995887696609 has 2 divisors, whose sum is σ = 3995887696610. Its totient is φ = 3995887696608.

The previous prime is 3995887696597. The next prime is 3995887696637. The reversal of 3995887696609 is 9066967885993.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3994513882384 + 1373814225 = 1998628^2 + 37065^2 .

It is a cyclic number.

It is not a de Polignac number, because 3995887696609 - 2⁷ = 3995887696481 is a prime.

It is a super-2 number, since 2×3995887696609² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3995887696699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1997943848304 + 1997943848305.

It is an arithmetic number, because the mean of its divisors is an integer number (1997943848305).

Almost surely, 2^{3995887696609} is an apocalyptic number.

It is an amenable number.

3995887696609 is a deficient number, since it is larger than the sum of its proper divisors (1).

3995887696609 is an equidigital number, since it uses as much as digits as its factorization.

3995887696609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9523422720, while the sum is 85.

The spelling of 3995887696609 in words is "three trillion, nine hundred ninety-five billion, eight hundred eighty-seven million, six hundred ninety-six thousand, six hundred nine".